1 /* SPDX-License-Identifier: MIT */ 2 #ifndef __NVKM_I2C_H__ 3 #define __NVKM_I2C_H__ 4 #include <core/subdev.h> 5 #include <core/event.h> 6 7 #include <subdev/bios.h> 8 #include <subdev/bios/i2c.h> 9 10 struct nvkm_i2c_bus_probe { 11 struct i2c_board_info dev; 12 u8 udelay; /* set to 0 to use the standard delay */ 13 }; 14 15 struct nvkm_i2c_bus { 16 const struct nvkm_i2c_bus_func *func; 17 struct nvkm_i2c_pad *pad; 18 #define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n) 19 #define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 20 #define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1 21 #define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2 22 int id; 23 24 struct mutex mutex; 25 struct list_head head; 26 struct i2c_adapter i2c; 27 u8 enabled; 28 }; 29 30 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); 31 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); 32 int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *, 33 struct nvkm_i2c_bus_probe *, 34 bool (*)(struct nvkm_i2c_bus *, 35 struct i2c_board_info *, void *), void *); 36 37 struct nvkm_i2c_aux { 38 const struct nvkm_i2c_aux_func *func; 39 struct nvkm_i2c_pad *pad; 40 #define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n) 41 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 42 int id; 43 44 struct mutex mutex; 45 struct list_head head; 46 struct i2c_adapter i2c; 47 u8 enabled; 48 49 u32 intr; 50 }; 51 52 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); 53 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); 54 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); 55 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, 56 u32 addr, u8 *data, u8 *size); 57 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, 58 bool enhanced_framing); 59 60 struct nvkm_i2c { 61 const struct nvkm_i2c_func *func; 62 struct nvkm_subdev subdev; 63 64 struct list_head pad; 65 struct list_head bus; 66 struct list_head aux; 67 68 #define NVKM_I2C_PLUG BIT(0) 69 #define NVKM_I2C_UNPLUG BIT(1) 70 #define NVKM_I2C_IRQ BIT(2) 71 #define NVKM_I2C_DONE BIT(3) 72 #define NVKM_I2C_ANY (NVKM_I2C_PLUG | NVKM_I2C_UNPLUG | NVKM_I2C_IRQ | NVKM_I2C_DONE) 73 struct nvkm_event event; 74 }; 75 76 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); 77 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); 78 79 int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 80 int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 81 int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 82 int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 83 int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 84 int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 85 int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 86 int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 87 int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 88 89 static inline int 90 nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 91 { 92 u8 val; 93 struct i2c_msg msgs[] = { 94 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 95 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, 96 }; 97 98 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 99 if (ret != 2) 100 return -EIO; 101 102 return val; 103 } 104 105 static inline int 106 nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 107 { 108 u8 val[2]; 109 struct i2c_msg msgs[] = { 110 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 111 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, 112 }; 113 114 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 115 if (ret != 2) 116 return -EIO; 117 118 return val[0] << 8 | val[1]; 119 } 120 121 static inline int 122 nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) 123 { 124 u8 buf[2] = { reg, val }; 125 struct i2c_msg msgs[] = { 126 { .addr = addr, .flags = 0, .len = 2, .buf = buf }, 127 }; 128 129 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 130 if (ret != 1) 131 return -EIO; 132 133 return 0; 134 } 135 136 static inline int 137 nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) 138 { 139 u8 buf[3] = { reg, val >> 8, val & 0xff}; 140 struct i2c_msg msgs[] = { 141 { .addr = addr, .flags = 0, .len = 3, .buf = buf }, 142 }; 143 144 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 145 if (ret != 1) 146 return -EIO; 147 148 return 0; 149 } 150 151 static inline bool 152 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) 153 { 154 return nvkm_rdi2cr(adap, addr, 0) >= 0; 155 } 156 157 static inline int 158 nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 159 { 160 const u8 xfer = size; 161 int ret = nvkm_i2c_aux_acquire(aux); 162 if (ret == 0) { 163 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size); 164 WARN_ON(!ret && size != xfer); 165 nvkm_i2c_aux_release(aux); 166 } 167 return ret; 168 } 169 170 static inline int 171 nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 172 { 173 int ret = nvkm_i2c_aux_acquire(aux); 174 if (ret == 0) { 175 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size); 176 nvkm_i2c_aux_release(aux); 177 } 178 return ret; 179 } 180 #endif 181